/Engine/Source/Runtime/InteractiveToolsFramework/Public/ToolContextInterfaces.h
Users of the Tools Framework need to implementIToolsContextRenderAPIto allow Tools, Indicators, and Gizmos to make low-level rendering calls for things like line drawing. This API will be passed to egUInteractiveTool::Render(), so access is only provided when it makes sense to call the functions
class IToolsContextRenderAPI